Garmin G1000 Pilot's Manual page 178

MULTI FUNCTION DISPLAY
TAWS Inhibit
Flying VFR into an area where unique terrain exists
could cause the system to annunciate a nuisance alert.
When TAWS is inhibited, only FLTA and PDA alerts are
disabled.
To Inhibit TAWS:
1. While the TAWS Page is displayed, press the
MENU key.
2. Turn the small FMS knob to select'Inhibit
TAWS'.
Press the ENT key.
3.
To Enable TAWS:
1. While the TAWS Page is displayed, press the
MENU key.
2. Turn the small FMS knob to select 'Enable
TAWS'.
Press the ENT key.
3.
Manual System Test
A system test is automatically performed at power-up.
After sucessful completion of the test, "TAWS System
Test, OK" will be heard.
The system test may also be initiated manually, but
only when the aircraft is on the ground. To manually verify
proper operation of the aural and visual annunciations
of the system, perform the following steps.
1. While the TAWS Page is displayed, press the
MENU key.
Turn the small FMS knob to select 'Test
2.
TAWS'.
3 Press the ENT key. During the test 'TAWS TEST'
is displayed in the center of the TAWS Page.
When all is in working order, "TAWS System
Test, OK" will be heard.
7-42
Forward Looking Terrain Avoidance (FLTA)
The Forward Looking Terrain Avoidance alert is
composed of two sub-functions:
Reduced Required Terrain Clearance (RTC) and
Reduced Required Obstacle Clearance (ROC)
This provides alerts when the aircraft flight path
is above terrain and/or obstacles, yet is projected to
come within minimum clearance values outlined in the
following table. When an RTC or ROC alert is issued, a
potential impact point is displayed on the TAWS Page as
a yellow or red 'X'.
Imminent Terrain Impact (ITI) and Imminent
Obstacle Impact (IOI)
This provides alerts when the current aircraft altitude
is below the elevation of terrain in the aircraft' s projected
path and the vertical flight path is calculated to come within
minimum clearence values outlined in the following table.
ITI and IOI alerts are accompanied by a potential impact
point displayed on the TAWS Page as a yellow or red 'X'.
Phase of Flight
During the final approach phase of flight, RTC/ROC/
ITI/IOI alerts are automatically inhibited when the aircraft
is below 200 feet AGL while within 0.5 nm of the approach
runway or is below 125 feet AGL while within 1 nm of the
runway.
Garmin G1000 Pilot's Guide for Cessna Nav III
Level Flight
Enroute 700 ft.
Terminal 350 ft.
Approach 150 ft.
Departure 100 ft.
Descending
500 ft.
300 ft.
100 ft.
100 ft.
190-00498-00 Rev. A